Birth in Biological Definition

Human

... 1 Terminology 2 Biology 2.1 birth and death 2.2 Physiology 2.3 Genetics ... Biology A human skeleton birth and death The life of the individual begins ... in Uganda at 14.8 years). Life expectancy at birth is 77.2 years in the U.S. as of 2001 . [4] The ...

Twin

... have health consequence to the babies, twins birth are more often handled with special procedures ... blindness . Turner syndrome can occur in any birth (including singletons, fraternal female twins, or ... Multiple births Main article: Multiple birth Sometimes multiple births may involve more ...

Herpetology

... water for at least some part of their life, if only the laying of eggs or birth of young. Their skins have many glands and are often toxic. Reptiles, by ... and living reptilians usually if not always lay eggs or give birth on land, even marine turtles which only come ashore for this purpose. ...

Anton van Leeuwenhoek

... first to observe and describe muscle fibres, bacteria , spermatozoa and blood flow in capillaries (small blood vessels ). His name at birth was Thonis Philipszoon . His letters were signed Antoni van Leeuwenhoek . He was probably known as van Leeuwenhoek from a young age because he ...

Cloning

... cloning was once the Woolly mammoth , but attempts to extract DNA from frozen mammoths have been unsuccessful. In 2000 , a cow named Bessie gave birth to a cloned Asian guar, an endangered species; this provided hope that similar techniques (using surrogate mothers of another species) might be used ...

Culture

... end of the last ice age helped lead to the invention of agriculture. Some inventions that affected Western culture in the 20th century were the birth control pill , television , and the Internet . The pill helped families have more money and women have more freedom. Television not only brought ...

Diabetes mellitus

... of all pregnancies . It is temporary and fully treatable, but if untreated it may cause problems with the pregnancy, including macrosomia (high birth weight) of the child. It requires careful medical supervision during the pregnancy. In addition, about 20-50% of these women go on to develop type 2 ...

DNA

... form of the Meselson-Stahl experiment . Work by Crick and coworkers deciphered the genetic code not long afterward. These findings represent the birth of molecular biology . Watson , Crick , and Wilkins were awarded the 1962 Nobel Prize for Medicine for discovering the molecular ...

Down syndrome

... children with Down Syndrome should, statistically, have been born per year (at a prevalence rate of 1:600), but only 63 p.a. were listed in the 1995 birth register. Providing what advocates call outdated and biased information on the personality of a child with Down Syndrome, doctors often encourage ...

Edward's syndrome

... its ability to grow and develop appropriately is delayed or confused. This results in characteristic physical abnormalities such as low birth weight ; a small, abnormally shaped head; small jaw; small mouth; low-set ears; and clenched fists with overlapping fingers. Those with Edward's ...

Embryo

... zygote (a fertilized ovum ) until it becomes a foetus . An embryo is called a foetus at a more advanced stage of development and up until birth or hatching. In humans, this is from the eighth week of gestation . Stages : morula -> blastula -> gastrula . See also ...

Endosymbiotic theory

... (Discusses the endosymbiont theory of the evolution of flagella , and has more on Margulis) Hydrogen hypothesis External links The birth of Complex Cells - by Christian de Duve References Bruce Alberts, Alexander Johnson, Julian Lewis, Martin Raff, Keith Roberts and Peter ...

Gregor Mendel

... respective offspring retained the essential traits of the parents, and therefore were not influenced by the environment. This simple test gave birth to the idea of heredity. Mendel read his paper, Experiments on Plant Hybridization , at two meetings of the Natural History Society of Brunn in ...

Hepatitis B

... stage a full recovery and develop protective immunity to the virus. However, only 5% of neonates that acquire the infection from their mother at birth will clear the infection. Seventy percent of those infected between the age of one to six will clear the infection. When the infection is not ...

Infertility

... treatments have resulted in an increase in multiple births , provoking ethical analysis because of the link between multiple pregnancies, premature birth , and a host of health problems. Religious leaders' instructions on fertility treatments. Psychological impact Infertility may have a ...

Life

... concept with no simple definition. Life may refer to: the ongoing process of which living things are a part; the period between the birth and death of an organism ; the condition of an entity that has been born and has yet to die; , that which makes a living thing alive. ...

Nutrition

... "you are what you eat!" More specifically, in humans, the matter which comprises the cells of the body (except those cells produced before birth ) is acquired from food in the digestive system . Not all the food matter in the stomach can be used for the body; the matter that is left over as ...

Origin of life

... of a possible solution using crystalline behaviors of clays Model of origin of life involving zeolite, press release for PNAS paper The birth of Complex Cells, and the oxygen holocaust — by Christian de Duve Possible Connections Between Interstellar Chemistry and the Origin of ...

Oswald Avery

... with the Hershey-Chase experiment . These experiments paved the way for Watson and Crick 's discovery of the structure of DNA, and thus the birth of modern genetics and molecular biology. The experiment was a simple one in concept. Bacteria are able to transfer genetic material through a ...

Parthenogenesis

... some of the guppy species in the genus Poeciliopsis . See also Apomixis for a similar process in plants. Parthenocarpy Virgin birth Jacques Loeb Gregory Goodwin Pincus References Dawley, Robert M. & Bogart, James P. (1989). Evolution and Ecology of ...

Rudolf Steiner

... within. An obstacle to 'getting' Steiner, in the just mentioned sense, is that reading for people today is rarely a process where the dynamic birth of the conceptual out of a pre-conceptual background is felt and recreated as we read each word. When reading is creative today, that creativity ...

Stem cell

... ethical debate ) Sources of stem cells Cord blood stem cells Blood from the placenta and umbilical cord that are left over after birth is one source of adult stem cells. Since 1988 these cord blood stem cells have been used to treat Gunther's disease , Hunter syndrome , Hurler ...

Thermoregulation

... after birth, lose their body heat until their temperature has fallen to within a few degrees of that of the surrounding air. But such animals are at birth blind, helpless and in some cases naked. Animals who are born when in a condition of greater development can maintain their temperature fairly ...